Sizing material



Patented July 16, 1935 i r H i V UNITED STATES: PATENT, OFFlCE Max W. Hendrich, Millington, J., assignor, of one-fourth to R. W. Semerad, Milli ngton, N. J., and three-fourths to Harry; Radzinsky, New York, NY.

N Drawing. Application August 29, 1933,

Serial No. 687,335

3 Claims. (Cl. 13418) For a long time painters and decorators have of about 120 degrees Fahrenheit. Then 16 ounces searched for a cheap preparation which, when of acetic acid are added and the temperature of applied to stone, concrete, brick and stuccoed the mix is heated to raise it to 250 degrees Fahsurfaces intended to be subsequently covered by renheit. The mixture is thereupon thoroughly 5 oil or water paint, will neutralize free alkali in stirred and permitted to cool. The mixture is 5 such materials and prevent the saponification by then allowed to stand for some hours (preferalkali of the binder or oil in the paint film. The ably over night) and the next day it is rc-heated object of the invention is to provide a preparato 120 degrees Fahrenheit, and 96 ounces of nitric tion which will fulfill these requirements and acid are added, the solution being stirred to thorwhich will damp-proof the surface to which it oughly incorporate the acid in it. The solution 10 is applied. is then permitted to cool and is ready for use.

Such a preparation, to be entirely satisfactory, I am aware that in the past, efforts have been must not close the pores of the surface to which made to mix aluminum stearate or oleate with it is applied, but on the other hand must stop a petroleum vehicle but such efforts have resulted suction of the surface to which paint is subsemerely in the production of a solution of colloidal 15 quently applied and consequently chalking of nature, or a suspensoid, in which there was no the paint is prevented, and its elasticity, life and true mixture of the aluminum stearate or oleate color is materially maintained and lengthened. with the vehicle, so that the preparation was The improved sizing material meets these recloudy and required heat in cold weather to bring quirements. It is more readily applied than glue it back into workable condition. Such mixtures 20 or varnish size; when supplied to the painter it also did not permit the use of a sufficiently high is ready for use without stirring, heating or other percentage of solids in solution, the. greatest treatment; is not afiected by heat or cold and known percentage being approximately five per even in freezing weather will not precipitate the cent.

solids in it and will not become clouded. Paint The solution herein described is a true solupp d V I a u a W ch as b n S zed With tion and will not precipitate regardless of temthis material is easily applied since it flows perature changes and can easily carry double the s y on e ac a d qu s no percentage of solids heretofore carried in prior pouncingmixtures. The introduction of nitric acid into In preparing the al, t ll w forthe mixture acts to change the suspensoidal mix- 30 mula is used: ture of stearate and petroleum distillate into a true solution which may easily contain double the usual amount of stearate found in suspensoidal mixtures. This large percentage of stearate plus the free acid in the solution form it into a, neutralizing agent for free lime which is inherent in most building materials that are to be painted. The solution when used, is not a pore filler as is the case with most sizing materials. It does not form a film on the surface to which it is applied but provides a natural bond for the subsequently; applied paint layer. Paint flows easily over the The proportions set forth may be altered to surface to which the sizing has been applied and suit different requirements. requires little brushing effort to spread it out. 4.5 To compound the solution, 20 gallons of the Despite the application of the paint on a relavehicle (petroleum distillate or the like) and the tively rough surface, no pouncing of the brush 30 pounds of aluminum stearate or oleate are is necessary. On a coarse finish slab of plaster, placed in a steam-jacketed kettle and heated to coated with the solution, a metallic red paint a temperature of. 250 degrees Fahrenheit or more. was applied, and a paint saving of 40 per cent was The mixture is stirred while being heated, and realized as against an untreated portion of the 50 while being stirred 40 gallons of the vehicle same slab. Onamedium finish slab the paint savshould be added. Then 2 gallons of acetone are ing was 52 per cent. In both cases the paint on added. When these ingredients are well mixed, the treated portion of the slab possessed a fine 40 gallons of vehicle should be added and the glossy finish, while that on the untreated por- 55 mixture then allowed to cool to a temperature tion was dull and flat. 55

100 gallons of vehicle, such as a petroleum distillate, (any light lubricating oil down through kerosene, naptha and gasoline) 2 gallons of acetone 30 lbs. of solids (for an approximately 10 per cent solution) such as aluminum stearate, aluminum oleate or both 4O 16 ounces per cent acetic acid (CHsCOOH) 96 ounces 38 per cent nitric acid (I-INOz), as

solvent.

The aluminum stearate or oleate becomes insoluble as soon as the vehicle has evaporated. It is not affected by the alkali present in building material and plaster, and dampness will not penetrate a surface to which the solution is applied, unless under pressure.

What I claim is:-

1. A sizing material or the like comprising a petroleum distillate, aluminum stearate, acetic acid and nitric acid.

2. A sizing material or the like composed of the following materials mixed in the approximate proportions set forth:l00 gallons petroleum distillate, 2 gallons acetone, 30 pounds of aluminum'stearate or oleate; 16 ounces acetic acid and 96 ounces nitric acid.

3. The method of making a sizing material consisting in heating a mixture of aluminum stearate and a petroleum distillate to a temperature of at least 250Fahrenheit, stirringthe heated mixture and adding acetone thereto, adding an additional quantity of the petroleum distillate and allowing the mixture to cool to a temperature of at least 120? F; adding acetic acid to the mixture while the mixture is at the reduced temperature, heating the mixture to at least 250? F., permitting themixture to cool and stand, reheating it to a temperature of at least 120 F. and adding nitric acid toit and then permitting the mixture to cool.

MAX W. HENDRICH. 

